CN100478657C - Wide viewing field and high resolution ratio imaging arrangement for pushbroom optical spectrum imagers - Google Patents
Wide viewing field and high resolution ratio imaging arrangement for pushbroom optical spectrum imagers Download PDFInfo
- Publication number
- CN100478657C CN100478657C CNB2005100244810A CN200510024481A CN100478657C CN 100478657 C CN100478657 C CN 100478657C CN B2005100244810 A CNB2005100244810 A CN B2005100244810A CN 200510024481 A CN200510024481 A CN 200510024481A CN 100478657 C CN100478657 C CN 100478657C
- Authority
- CN
- China
- Prior art keywords
- imaging
- visual field
- narrow slit
- resolution
- pull
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Spectrometry And Color Measurement (AREA)
Abstract
A wide viewing field and high-definition imaging structure of frayed end imaging spectrograph, which comprises wide viewing field image-forming lens, several narrow slits, spectrometer, which comprises collimating mirror, optical grating and collective lens), and plate array light-sensitive detector. Optic axis of spectrometer is parallel with imaging lens optic axis. Light splitting is exerted on different viewing narrow slits of image lens focal surface to paste-up a wide viewing field and high-definition imaging spectrum system. According to actual requirement, length and sum of narrow slit, focus of imaging lens and the size of detecting element can be chosen to produce imaging spectrograph of different imaging viewing fields and distinguishabilities.
Description
Technical field:
The present invention relates to a kind of hyperspectral imager and realize wide visual field and high-resolution improvement structure, particularly about a kind of spaceborne/the wide visual field and the high-resolution imaging arrangement of airborne broom pushing type hyperspectral imager.
Background technology:
Imaging spectrometer is in recent years along with the needs of earth observation and improving of photoelectric technology and the remote sensing instrument of new generation that grows up, it organically combines conventional two-dimensional imaging remote sensing technology and spectrometer technology, can obtaining in the object of observation two-dimensional space information, obtain the spectrum picture of target with high spectral resolution.Owing to contain the spectral information relevant in the spectral image data that is obtained with the target being observed component, can disclose atural object spectral characteristic, have situation and material composition, thereby make the Direct Recognition imageable target become possibility, therefore, in observations such as atmosphere, ocean and land, be widely used.
The pull-broom type imaging spectrometer is according to the principle of push broom imaging and grating beam splitting, utilize large-scale focal plane array detector to make, can obtain the space and the spectral information of long narrow atural object band at one time, at this moment, one dimension in the planar array detector is finished aerial image, be referred to as the space dimension, and another dimension is finished light spectrum image-forming, be referred to as the spectrum dimension, finish large-scale scanning imagery again via travelling forward of flying platform.
The pull-broom type imaging spectrometer is made up of imaging mirror, narrow slit, spectrometer (being made up of the collimating mirror, grating and the convergent mirror that connect with light path successively) and planar array detector usually.Figure 1 shows that single pull-broom type ultra-optical spectrum imager (finger) optical head module map by single imaging mirror, spectrometer, the imaging spectrometer that planar array detector is integrated.Because the difficulty that the big planar array detector of the restriction of optical efficiency and frame transfer is made, the current single imaging spectrometer field angle that exists in the world is not more than 40 °, thereby operating efficiency is lower, simultaneously, also can't satisfying society, growing (the high resolving power HYPERSPECTRAL IMAGERY can provide terrain object meticulous geometrical property to the high resolving power HYPERSPECTRAL IMAGERY, can provide abundant spectral information again, to atural object carry out automatically, fast target identification and classification, have great practical value), these have all limited the usable range of hyperspectral imager greatly.The a plurality of freestanding small field of view imaging spectrometer of current common employing is realized the sub-unit of the method for wide view field imaging to each imaging spectrometer in the field stitching mode, particularly the performance index consistance of imaging lens, splicing construction stability and system's dress school requirement are all high, have also strengthened the difficulty of Flame Image Process.Simultaneously, adopt the high-definition picture of the same atural object that different instruments obtain and the fusion of registration and image that spectrum picture carries out image, generate the method for new high resolving power HYPERSPECTRAL IMAGERY, because of there being performance difference between the operating instrument optical head inevitably, the difficulty that not only will cause the Data Fusion aspect, and the error of spatial registration has a significant impact the visual fusion effect between image.
Summary of the invention:
In sum, how to overcome prior art because the difficulty that the big planar array detector of the restriction of optical efficiency and frame transfer is made, and the current single imaging spectrometer field angle that exists in the world that causes is lower, and the defective that resolution is not high yet is a technical matters to be solved by this invention.Therefore, the object of the present invention is to provide a kind of wide visual field and high-resolution imaging arrangement, so that solve the above-mentioned relevant issues of pull-broom type ultra-optical spectrum imager.
It is as follows that technology of the present invention solves thinking:
Under the condition that current big view field imaging lens design is made and present small field of view pull-broom type ultra-optical spectral imaging technology is ripe gradually, adopt the imaging lens imaging surface of single big visual field, its focal plane then reaches the purpose of wide visual field and high-resolution imaging for many narrow slits independence spectroscopic imaging.The specific implementation measure is as follows:
1. adopt imaging lens that the ground object target in the big visual field is imaged on its focal plane, a plurality of narrow slits are set, these a plurality of narrow slits are placed with parallel to each other and dislocation, be spliced to form the big visual field of wearing the rail direction jointly at the focal plane place.
2. spectrometer and the planar array detector that all rearmounted collimating mirror, grating and the convergent mirror that comprises into the light path connection of each narrow slit on the imaging lens focal plane constituted carries out beam split and imaging to the light that enters each narrow slit respectively.
3. the adjacent narrow slit of each narrow slit of placing on the focal plane has the overlapping region of trace between mutually, guarantees that whole imaging spectrometer does not have the appearance of imaging blind area in imaging viewing field.
4. the slit of the n bar L length at imaging lens focal plane place, being equivalent to be spliced into a length of wearing the rail direction is the long narrow slit of n*L, is the imaging lens of f for focal length, what form 2arctan (n*L/2f) wears the rail visual field.If the space of the planar array detector behind every narrow slit dimension pixel is m, then form and wear the instantaneous field of view that the rail direction is about 2arctan (L/2f)/m, this instantaneous field of view is as the theoretical resolution of wearing the rail direction, and true resolution general and instrument is proportional, is commonly used to characterize the resolution characteristic of instrument.As can be seen, when L and m were constant, different n, f combination can constitute different imaging viewing fields and imaging resolution.
5. optical axis no longer is a coaxial relation between imaging mirror optical axis and the follow-up optics of each slit, but is parallel relation mutually.
6. be the placement space that guarantees the follow-up device of each narrow slit, the catoptron of placing appropriate format between imaging lens and focal plane thereof plays the light path effect of turning back.
As mentioned above, wide visual field and high-resolution imaging structure according to a kind of pull-broom type imaging spectrometer of the present invention, it comprises imaging lens and the imaging focal plane that connects with optics, characteristics are: this imaging lens adopts the imaging lens of single big visual field, this imaging focal plane then is divided into a plurality of narrow slit independence spectroscopic imaging, and each narrow slit splices jointly to reach wide visual field and high-resolution spectroscopy imaging.
Described many narrow slits of focal plane independence beam split joining image-forming structure is: the parallel to each other and dislocation placement of each narrow slit on the focal plane, be spliced to form the big visual field of wearing the rail direction jointly, the overlapping region of trace is arranged between adjacent narrow slit, guarantee that whole imaging spectrometer does not have the appearance of imaging blind area in imaging viewing field;
Described many narrow slits independence beam split joining image-forming structure: each narrow slit has independently follow-up optics, spectrometer and planar array detector that they comprise the collimating mirror, grating and the convergent mirror formation that connect with optics successively respectively carry out beam split and imaging to the light that enters each narrow slit respectively;
Described many narrow slits independence beam split joining image-forming adopts different imaging lens focal lengths, narrow slit length, narrow slit quantity, surveys the light spectrum image-forming structure that the pixel size combinations can be made different imaging viewing fields and imaging resolution;
Described many narrow slits independence beam split joining image-forming, except that the optical axis of the optical axis of the follow-up optics of the 0 ° of visual field narrow slit that is positioned at imaging lens and imaging lens be the coaxial relation, the optical axis of the follow-up optics of all the other each narrow slits all is to be parallel relation mutually;
Described many narrow slits independence beam split joining image-forming, for guaranteeing the placement space of the follow-up device of each narrow slit, the catoptron of placing appropriate format between before imaging lens and focal plane thereof plays the light path effect of turning back.
The invention has the advantages that:
Adopt the imaging lens imaging of single big visual field, many narrow slits of focal plane independence spectroscopic imaging structure reaches wide visual field and high-resolution imaging, has improved the operating efficiency and the scope of application of instrument operation; The present invention can select the length of the quantity of narrow slit and imaging lens focal length to determine the imaging viewing field and the resolution of instrument according to actual needs, and is flexible and practical; Because each narrow slit and the shared same imaging lens of follow-up electro-optical system thereof make instrument lightweight, miniaturization, alleviate dress school workload simultaneously greatly.
Description of drawings:
Fig. 1 is the optical head modular structure synoptic diagram of existing single type pull-broom type ultra-optical spectrum imager.
Fig. 2 is an embodiment of the invention imaging lens focal plane place narrow slit distribution schematic diagram.
Fig. 3 is an embodiment of the invention optical head modular structure synoptic diagram.
Embodiment:
Provide better embodiment of the present invention below in conjunction with Fig. 2～Fig. 3, mainly be described in further detail characteristics of the present invention, but not be used for limiting scope of the present invention:
See also Fig. 3 earlier, Fig. 3 is the optical head modular structure synoptic diagram of 80 ° of visual fields of specific embodiment of the invention pull-broom type ultra-optical spectrum imager.Imaging mirror 0 visual field is 90 °, and focal length is 20mm.Do not adding four refluxing reflection mirror at 10,20,40,50 o'clock, five narrow slits in imaging lens focal plane place 11,21,31,41,51 distribute as shown in Figure 2, narrow slit 11,41 is positioned over along the rail backsight and locates for 10 °, narrow slit 31 is positioned over along place, 0 ° of visual field of rail, narrow slit 21,51 is positioned over along the rail forward sight and locates for 10 °, narrow slit length is 7mm, is spliced into the long narrow slit (overlapping region that trace is arranged between narrow slit) of wearing rail direction 34mm.
Placement space for the follow-up device that guarantees each narrow slit, to placing plane mirror 10,20,40,50 between its focal plane, catoptron 10 turns back narrow slit 11 and follow-up device collimating mirror 12 thereof, grating 13, convergent mirror 14, planar array detector 15 to the positive dirction of X-axis at imaging mirror 0; Equally, catoptron 20 turns back narrow slit 21 and follow-up device collimating mirror 22 thereof, grating 23, convergent mirror 24, planar array detector 25 to the positive dirction of Y-axis, and catoptron 40 turns back narrow slit 41 and follow-up device collimating mirror 42 thereof, grating 43, convergent mirror 44, planar array detector 45 to the negative direction of Y-axis; Catoptron 50 turns back narrow slit 51 and follow-up device collimating mirror 52 thereof, grating 53, convergent mirror 54, planar array detector 55 to the negative direction of X-axis; Do not place catoptron before the narrow slit 31, its light path and follow-up device collimating mirror 32, grating 33, convergent mirror 34, planar array detector 35 are placed along Z axle positive dirction.
Claims (6)
1, a kind of wide visual field of pull-broom type imaging spectrometer and high-resolution imaging structure, comprise the imaging lens and the imaging focal plane that connect with optics, it is characterized in that this imaging lens is the imaging lens of single big visual field, and this imaging focal plane is divided into a plurality of narrow slits and independent beam split joining image-forming.
2, the wide visual field of pull-broom type imaging spectrometer according to claim 1 and high-resolution imaging structure, it is characterized in that, described many narrow slits of focal plane independence beam split joining image-forming structure is: the parallel to each other and dislocation placement of each narrow slit on the focal plane, be spliced to form the big visual field of wearing the rail direction jointly, the overlapping region of the trace that prevents the imaging blind area is arranged between adjacent narrow slit.
3, the wide visual field of pull-broom type imaging spectrometer according to claim 1 and 2 and high-resolution imaging structure, it is characterized in that, the follow-up optics that described each narrow slit has independently, respectively the light that enters corresponding narrow slit carried out beam split and imaging, described follow-up optics comprises the spectrometer of the collimating mirror, grating and the convergent mirror formation that connect with light path successively, and planar array detector.
4, the wide visual field of pull-broom type imaging spectrometer according to claim 3 and high-resolution imaging structure, it is characterized in that, adopt different imaging lens focal lengths, narrow slit length, narrow slit quantity and survey the pixel size light spectrum image-forming structure that becomes different imaging viewing fields and imaging resolution capable of being combined.
5, the wide visual field of pull-broom type imaging spectrometer according to claim 3 and high-resolution imaging structure, it is characterized in that, in the optical axis of the follow-up optics of described each narrow slit, except that the optical axis of the follow-up optics of the narrow slit of the 0 ° of visual field that is in imaging lens and the optical axis of imaging lens are the coaxial relation, all be the relation of being parallel to each other.
6, the wide visual field of pull-broom type imaging spectrometer according to claim 1 and high-resolution imaging structure is characterized in that, have also placed the catoptron of the effect of light path turnover between before this imaging lens and focal plane thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100244810A CN100478657C (en) | 2005-03-18 | 2005-03-18 | Wide viewing field and high resolution ratio imaging arrangement for pushbroom optical spectrum imagers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100244810A CN100478657C (en) | 2005-03-18 | 2005-03-18 | Wide viewing field and high resolution ratio imaging arrangement for pushbroom optical spectrum imagers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1664612A CN1664612A (en) | 2005-09-07 |
| CN100478657C true CN100478657C (en) | 2009-04-15 |
Family
ID=35035796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100244810A Expired - Fee Related CN100478657C (en) | 2005-03-18 | 2005-03-18 | Wide viewing field and high resolution ratio imaging arrangement for pushbroom optical spectrum imagers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100478657C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100593743C (en) * | 2007-12-21 | 2010-03-10 | 中国科学院上海技术物理研究所 | Linetype broad visual field image space division optical assembly |
| CN102175322B (en) * | 2011-01-31 | 2012-09-26 | 重庆大学 | Imaging spectrometer based on grating translational light modulator |
| CN102883095B (en) * | 2012-09-06 | 2015-03-11 | 中国科学院光电技术研究所 | Seamlessly spliced photoelectronic imaging system with double lens using 25 area-array detectors |
| CN102944225A (en) * | 2012-11-23 | 2013-02-27 | 中国科学院长春光学精密机械与物理研究所 | Push-broom confocal imaging aerospace camera optical system |
| CN104034417B (en) * | 2014-06-12 | 2017-01-11 | 中国科学院上海技术物理研究所 | Field-of-view registering device and method of onboard wide field-of-view imaging spectrometer |
| CN114236820B (en) * | 2021-12-30 | 2023-07-07 | 长光卫星技术股份有限公司 | Design method of optical spliced reflecting mirror of large-view-field remote sensing camera |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4875773A (en) * | 1988-05-06 | 1989-10-24 | Milton Roy Company | Optical system for a multidetector array spectrograph |
| US5285255A (en) * | 1989-06-16 | 1994-02-08 | Fisons Plc | Optical system for spectral analysis |
| US5452085A (en) * | 1993-01-27 | 1995-09-19 | Acton Research Corporation | Spectrographic astigmatism correction system |
| CN1544958A (en) * | 2003-11-20 | 2004-11-10 | 中国科学院上海技术物理研究所 | Airborne broom pushing type wide viewing field high spectrum remote sensing imaging system |
| CN2667475Y (en) * | 2004-01-08 | 2004-12-29 | 北京理工大学 | Reflective space modulation amplitude separating interference imaging spectrometer |
-
2005
- 2005-03-18 CN CNB2005100244810A patent/CN100478657C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4875773A (en) * | 1988-05-06 | 1989-10-24 | Milton Roy Company | Optical system for a multidetector array spectrograph |
| US5285255A (en) * | 1989-06-16 | 1994-02-08 | Fisons Plc | Optical system for spectral analysis |
| US5452085A (en) * | 1993-01-27 | 1995-09-19 | Acton Research Corporation | Spectrographic astigmatism correction system |
| CN1544958A (en) * | 2003-11-20 | 2004-11-10 | 中国科学院上海技术物理研究所 | Airborne broom pushing type wide viewing field high spectrum remote sensing imaging system |
| CN2667475Y (en) * | 2004-01-08 | 2004-12-29 | 北京理工大学 | Reflective space modulation amplitude separating interference imaging spectrometer |
Non-Patent Citations (2)
| Title |
|---|
| 无人机载小型多光谱成像仪的设计. 王斌永，舒嵘，贾建军，方抗美，戴方兴.光学与光电技术，第2卷第2期. 2004 * |
| 机载扫帚式高光谱成像仪实现宽视场的技术途径. 张立.红外，第9期. 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1664612A (en) | 2005-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2640311C (en) | Optically multiplexed imaging systems and methods of operation | |
| US8144312B2 (en) | Telescope with a wide field of view internal optical scanner | |
| CN100478657C (en) | Wide viewing field and high resolution ratio imaging arrangement for pushbroom optical spectrum imagers | |
| CN109443537B (en) | Spectral imager based on multiple image surfaces | |
| Sierk et al. | The Copernicus CO2M mission for monitoring anthropogenic carbon dioxide emissions from space | |
| CN103238048A (en) | Image mapped spectropolarimetry | |
| CN109489817A (en) | A kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum | |
| CN205808912U (en) | Compact high-resolution wide visual field spectrum imaging system | |
| CN212539414U (en) | Video hyperspectral imager based on array slit scanning | |
| CN103234632A (en) | Push broom type spectrum imaging optical system with high resolution and wide visual field | |
| US9030660B2 (en) | Multi-band imaging spectrometer | |
| CN100468045C (en) | Optical grating spectrometer | |
| CN108801460A (en) | A kind of Shared aperture multichannel all band Hyperspectral imager | |
| CN110319932A (en) | A kind of high light spectrum image-forming optics system | |
| CN112525345B (en) | Method for detecting similar targets by using DMD-based multi-target imaging spectrum system | |
| CN203249692U (en) | High-resolution wide-field of view optical system for push-broom spectral imager | |
| CN107144349A (en) | Modularization push-broom type visible ray/near infrared imaging spectrometer | |
| Xue et al. | Compact, UAV-mounted hyperspectral imaging system with automatic geometric distortion rectification | |
| CN103308161B (en) | Space remote sensing large-relative-hole-diameter wide-field high-resolution imaging spectrometer optical system | |
| CN104006885A (en) | Spatio-temporal union modulation Fourier-transformation imaging spectrometer and manufacturing method | |
| CN100498246C (en) | Machine-carried broom pushing type multidimension imaging device | |
| CN103558160B (en) | A kind of method and system improving light spectrum image-forming spatial resolution | |
| Miravet et al. | Development status of the telescope for the Ingenio/SEOSAT mission primary payload | |
| CN208688660U (en) | Shared aperture multichannel all band Hyperspectral imager | |
| CN112763065A (en) | Three-branch large-field PGP imaging spectrometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI INST. OF TECHNICAL PHYSICS, CHINESE ACAD Free format text: FORMER OWNER: SHANGHAI INST. OF TECHNICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Effective date: 20060630 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20060630 Address after: 200083 No. 500, Yutian Road, Shanghai Applicant after: Shanghai Inst. of Technical Physics, Chinese Academy of Sciences Co-applicant after: Shanghai Air Remote Information Technology Co., Ltd. Address before: 200083 No. 500, Yutian Road, Shanghai Applicant before: Shanghai Inst. of Technical Physics, Chinese Academy of Sciences |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20140318 |